Any opinions on the advantage arms glock conversion? Whats a good price on them lately? Are they worth it in $ saved on ammo?

Are there any pistol conversions for S&W MP pistols?

The Advantage Arms is the most popular most reliable conversion for Glocks. It has very similar sight picture to stock Glock sights but it is an adjustable rear sight which is a big plus. It takes standard Glock sights as well, so you could add the same night sites or whatever as your regular slide. My gun is my night time go-to gun (upstairs go-to gun anyway) so it is great to practice with the Streamlight in place using .22. This is a perfect training tool for learning trigger control IMHO, because you are unlikely to shoot 500-1000 rounds of larger caliber in a session. You shoot that much often and you can't help but get real good with that Glock trigger.

It makes for a super light gun, so the weight is not the same, but to me that's a good thing - it makes it super handy and fun to shoot, and shoot fast. Whatever mods you do to your frame stay with you for .22 practice.

I think they go for $300-$350 right now if they are in stock at an LGS.

For me it fills a role that my Walther P22, and MarkII cannot. I got mine as a trainer, but after shooting it it is my favorite 22 pistol (17-22 kit).

You do the math on the savings for what you paid for your ammo. I shoot mini-mags (.08 per round) and Golden Bullets (.055 per round) out of mine instead of shooting regular practice ammo like .40 S&W 165 gr WWB or 180 gr WWB (.40 per round). Last time I went out I shot $40 worth of .40 for 100 rounds and 400 rounds of .22 for about $20.

Did it SAVE me money? I would not have shot 500 rounds of .40 through the Glock. I still would have shot 100 and shot 400 rounds of .22 in another gun. I also would not have benefited from looking down the sights and pulling that Glock trigger 500 times.

Pistol 22 conversion units can be quite picky about the ammo they run with. Many, many moons ago, I bought an extremely expensive factory SIG 22 conversion kit for my SIG P210-2 9mm---the mags were expensive too---the conversion unit only functions with three types of ammo---22 Rem Golden Bullets, CCI Mini Mags and the cheaper CCI Blazers. The good news is it works damn near perfect with these three ammos...

My AA conversion for glock 17 is nice to let me draw from same holster as 9mm setup, and AA mags are cheap - about $14 each. Downsides are it's not nearly as accurate as my .22LR pistols, and conversions can be finicky with any custom light triggers. I like them both for different reasons.